JPH0253281A - Disk cartridge shutter opening/closing mechanism - Google Patents

Abstract

PURPOSE:To rapidly and easily perform the assembly of a shutter opening/ closing mechanism by providing a temporary connecting part to connect a torsion spring transiently to a rocking member. CONSTITUTION:The temporary connecting part 31 to connect the torsion spring 22 to the rocking member 23 transiently is provided. The assembly of the shutter opening/closing mechanism 11 is performed in such a way that the torsion spring 22 is arranged at a prescribed position on a lower case member 3 and also, the rocking member 23 is supported. Thereby, the torsion spring 22 is connected to the temporary connecting part 31 of the rocking member 23, which prevents the torsion spring 22 from being deviated from the prescribed position even when some external force, etc., is applied. Working such that an upper case member is joined with the lower case member 3 in such state, and after that, the function of the torsion spring 22 is applied on the shutter 13 by inserting the shutter 13 to a case, are performed. In such a way, it is possible to rapidly and easily perform assembling work.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a disk force for opening and closing a head insertion hole. Attach the shutter so that it can slide freely,
In the disk cartridge shutter opening/closing mechanism, the case includes a torsion spring that biases the shutter toward the closed position and a locking member that locks the auxiliary shutter in the closed position. By providing a temporary fixing portion for temporarily fixing the torsion spring, the shutter opening/closing mechanism can be assembled quickly and easily.

[Prior Art] A disk cartridge that rotatably houses a disk in its case is designed to prevent dust from entering the case through the head insertion hole and from touching the disk with fingers when the disk is not installed. A shirt is provided. This shutter is brought to an open position during the process of mounting the disc cartridge, and the shutter that is in the open position is brought to the closed position during the process of ejecting the disc cartridge.A conventional example of a disc cartridge equipped with such a shutter is shown in FIG. and the sixth
As shown in the figure.

In FIG. 5, the case l of the disk cartridge has an oblate shape composed of an upper case member 2 and a lower case member 3,
A disk 8 is rotatably housed within this case 1. A head insertion hole 10 is formed in the upper and lower surfaces of the case l at opposing positions, and this head insertion hole lO is opened and closed by a shutter opening and closing mechanism 11.

This shutter opening/closing mechanism 11 has a shutter 13, which has a pair of parallel parts 14 and 15 arranged in parallel.
and a connecting portion 16 that connects the pair of parallel portions 14 and 15, forming a substantially U-shaped cross section. This shutter! 3
are attached so as to sandwich the case I, and are configured to be slidable between a closed position in which the head insertion hole 10 is closed and an open position in which it is opened. Said shutter 1
A pin insertion i11+7 is formed on the front end side of the connector 3, and a spring locking portion 20 is provided to protrude inward.

Furthermore, a torsion spring 22 and a lock member 40 are arranged inside the case l. The above-mentioned 1-type spring 22 has a coil portion 24 in the center and tip bent portions 26a bent in opposite directions at both ends thereof.

26b, respectively. The coil portion 24 is disposed within the case 1 without being restricted in position, and one of the tip near-bent portions 26a is locked to the spring receiver portion 41 of the lower case member 3. The other tip bent portion 26b is locked by the spring locking portion 20 of the shutter 13, and the shutter 13 is urged toward the closed position by this spring force. The locking member 40 has an elastic tongue piece 44 and a pressed portion 45 extending from a support portion 43 supported by a pin portion 42 of the case 1 . The tip of this suppressed portion 45 is the bin inserted iW1 of the shutter 13? A locking groove 46 is also formed in this pressed portion 45 . The other end bent portion 26b of the tone spring 22 enters the locking groove 46 to prevent the shutter 13 from moving toward the open position.

When the disk cartridge is inserted into the disk drive device, the release bin 18 on the disk drive device side is opened.
enters the bottle insertion groove 17 of the shutter 13, and the pressed part 45 is displaced by the pressing force of the release bottle 18).
The locking groove 46 escapes from the other end bent portion 26b of the screw 22, and the shutter lock is released. Further, as the insertion stroke advances, the release pin 18 moves in the direction of the arrow a in FIG. 6. Following the movement of the release bottle 18, the shack 13 slides toward the open position against the spring force of the tone spring 22, and the head insertion hole 1O opens. Further, when the disk cartridge is pulled out from the disk drive device, the release bin 18 moves in the direction of arrow b in FIG. 6, and the shutter 13 slides toward the closed position by the spring force of the torsion spring 22. Then, when the shutter 13 slides to the closed position, the head insertion hole 10 closes and the release bottle 18 comes out of the bottle insertion groove 17 and locks into the locking groove 46.
The other bent end portion 26b of the torsion spring 22 enters into the shutter, thereby locking the shutter.

The shutter opening/closing mechanism 11 is assembled by inserting the locking member 40 into the pin part 42 of the lower case member 3, and locking the torsion spring 22 with the bent part 26a at one end of the torsion spring 22 in the spring receiver part 41 of the lower case member 3. The other end bent portion 26
b is placed in a state where it is locked in the locking groove 46 of the locking member 40. Then, the second case member 2 is placed over the lower case member 3, and the lower case member 3 and the upper case member 2 are joined.

The process is completed by inserting the shack 13 into this case l and locking the other end bent portion 26b to the spring locking portion 20 of the shutter 13.

Another method is to insert the lock member 40 into the pin portion 42 of the lower case member 3 and then join the upper case member 2. Then, the torsion spring 22 is inserted through the gap between the upper case member 2 and the lower case member 3, and one tip bent portion 26λ
The spring receiver of the lower case member 3 is engaged with the portion 41, and the other bent end portion 26b is engaged with the engagement groove 46 of the locking member 40.

The process is completed by inserting the shutter 13 into the case l and locking the other end bent portion 26b to the spring locking portion 20 of the shutter 13.

[Problem to be Solved by the Invention] However, during the above-mentioned former assembly operation, the torsion spring is not attached until the upper case member 2 is joined to the lower case member 3 after the torsion spring 22 is placed in a predetermined position. Since the torsion spring 22 is not supported in any way and a constant spring force is applied, the torsion spring 22 will easily shift from the predetermined position if some external force is applied. Therefore, there is a drawback that the assembly requires careful work, and if the torsion spring 22 comes off the predetermined position, the work must be redone.

Furthermore, in the latter assembly, the insertion of the torsion spring 22 is troublesome and requires caution in the insertion. If the torsion spring 22 is not inserted into the predetermined position, the upper case member 2 must be removed from the lower case member 3 and re-assembled, resulting in the same drawback as in the former case.

SUMMARY OF THE INVENTION An object of the present invention is to provide a disk cartridge shutter opening/closing mechanism that can be assembled quickly and easily.

[Means for Solving the Problems] In order to achieve the above object, a shutter opening/closing mechanism for a disk cartridge according to the present invention includes a case formed by joining an upper case member and a lower case member, and a head inserted into the case. A shutter that opens and closes the hole is attached so that it can slide freely.
A torsion spring and a lock member are disposed inside the case, and the spring force of the torsion spring is applied to the shutter to bias the shutter toward the closed position, and the lock member is supported by the case to move the shutter to the closed position. In the disk cartridge shutter opening/closing mechanism provided to prevent the shutter in the device from sliding, a temporary fixing portion for temporarily fixing the torsion spring is added to the locking member.

[To assemble the shutter opening/closing mechanism, a torsion spring is disposed at a predetermined position on the lower case member or the upper case member, and the lock member is supported. Then, the torsion spring is temporarily fixed by the temporary fixing portion of the locking member, and even if some external force or the like is applied, the torsion spring will not be displaced from the predetermined position. In this state, join the upper case member and the lower case member,
After that, the work is completed by inserting the shutter into the case and applying a torsion spring to the shutter.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

Embodiments of the invention are shown in FIGS. 1-4.

In FIGS. 1 to 3, the outside of the disk cartridge is covered with a substantially oblong-shaped case (2). This case 1 is composed of an upper case member 2 and a lower case member 3 whose peripheral end surfaces are joined to each other. The lower case member 3 is provided with a peripheral wall 4 and a circumferential partition 5, and inside the case 1 there is a disk storage chamber 6 surrounded by the partition 5 and a disk storage chamber 6 surrounded by the partition 5 and the partition 4. There are four separate compartments 7. A disk 8 is rotatably accommodated in the disk storage chamber 6. Further, a turntable insertion hole 9 is formed in a substantially medium portion of the lower case member 3, and a turntable of a disk drive device is inserted through this turntable insertion hole 9, and the disk 8 is driven to rotate. Head insertion holes 10 are formed in opposing positions of the upper case member 2 and lower case member 3, and the head insertion holes l
From O, the head of the disk drive device approaches or comes into contact with the disk 8. This head insertion hole 10 is opened and closed by a shutter opening/closing mechanism 11.

The shutter opening/closing mechanism 11 has a shutter slide surface 12 recessed one step more inward than other locations on the outer surface of the upper case member 2 and lower case member 3 at a position that includes the head insertion hole 10 and the turntable insertion hole 9. This shutter slide surface! 2, the shutter l3 slides. This shutter 1
3 is formed into a substantially U-shaped cross section by a pair of parallel portions 14.15 arranged in parallel and a connecting portion 16 that connects the pair of parallel portions 14.15. The shutter 13 is attached to the case 1 so as to sandwich the case 1, and has a closed position (the position shown in FIG. 2) in which the head insertion hole IO and the turntable insertion hole 9 are closed, and an open position (the position shown in FIG. 4) in which it opens them. (positions shown). A pin insertion groove 17 is formed on the front end side of the shutter 13 by cutting a part of the pair of parallel parts 14 and 15 and the connecting part 16. The release pin 18 inserted into the bottle insertion groove 17 slides on the pin sliding surface 19 of the lower case member 3, and the shutter 13 slides. Near the bottle insertion groove 17, a spring locking portion 20 and a lock pawl 21 are provided by cutting and bending the connecting portion 16. Further, the shutter opening/closing mechanism 11 includes a torsion spring 22 and a locking member 2.
3, and the torsion spring 22 and lock member 23 are arranged in the compartment 7 at the position where the shutter 13 slides. The torsion spring 22 includes a central coil portion 24 and substantially straight portions 2 extending from both ends of the coil portion 24.
5a, 25b, and tip bent portions 26a, 26b which are bent in opposite directions at both ends thereof.

This torsion spring 22 is arranged in the compartment 7 without supporting the coil part 24, and one substantially straight part 25a passes above the locking member 23, and one tip bent part 26a engages the spring on the case l side. It is inserted into the stop chamber 27. Also, the other substantially straight portion 25b passes through the spring movement space 28 described below and connects to the other tip bent portion 26b or the spring locking portion 20 of the shutter 13.
The shutter 13 is urged toward the closed position by this spring force. The locking member 23 is attached to the support portion 2
9, a suppressed portion 30 extending from the support portion 29, and a temporary fixing portion 31. A pin hole 32 is formed in the support portion 29, and a pin portion 33 of the lower case member 3 is press-fitted into the pin hole 32. The tip side of the pressed portion 30 is disposed within the pin insertion groove 17 of the shutter 13, and the second pressed portion 30
is located on the slide trajectory of the lock pawl 21 of the shutter 13 to prevent the shutter 13 from moving toward the open position.

Further, the pressed portion 30 is a position regulating protrusion 34 of the lower case member 3.
, and the movement of the pressed portion 30 toward the pin insertion groove 17 side is restricted. The temporary fixing part 31 extends along the front end of the lower case member 3, and has a bottle hole 35 formed near its tip. A bottle portion 36 of the lower case member 3 is inserted into the bottle hole 35. The bottle hole 35 is formed in a rectangular shape to allow for dimensional errors and to facilitate elastic displacement of the pressed portion 30. That is, the lock member 23 is supported by the lower case member 3 by inserting the bottle portions 36 and 33 into the bottle hole 35 and the bottle hole 32, respectively. Further, the pin portion 33 is inserted between the temporary fixing portion 31 and the lower case member 3.
．． A spring movement space 28 is formed between the springs 36 and 36, in which the other substantially linear portion 25b is disposed. A portion of the tip of the temporary fixing part 31 contacts the peripheral wall 4 of the lower case member 3, and the temporary fixing part 31 and the peripheral wall 4 constitute the spring locking chamber 27 described above.

In the above configuration, when the disk cartridge is inserted into the disk drive device, as shown by the solid line in FIG.
The release bin 18 of the disk drive device enters the bin insertion groove 17 of the shutter 13, and as shown by the two-dot chain line in FIG. The lock claw 2I escapes from the slide trajectory and is unlocked. When further inserted from this state,
The release bottle 18 moves on the pin sliding surface 19 in the direction of the arrow in FIG. Following this movement of the release bottle 18, the shutter 13 slides toward the open position against the spring force of the torsion spring 22, and the head insertion hole 10 is gradually opened. When the shutter 13 reaches the open position shown in FIG. 4, the shutter 13 stops sliding and the head insertion hole 10 is fully opened. Further, when the disk cartridge is pulled out from the disk drive device, the release bin 18 moves in the direction of the arrow in FIG. comes into contact with the pressed portion 30 . When the shutter 13 slides further, the suppressed portion 30 is displaced to the position indicated by the two-dot chain line in FIG. 2, and the locking claw 2! When the lock pawl 21 passes through, it is again displaced to the position shown by the solid line in FIG. 2 and locked. Then, at the position where shutter 13 is locked, shutter 1 is
3 is in the closed position, the slide stops, and the head insertion hole 1
0 is completely closed. Further, when the disk cartridge is pulled out, the release bin 18 is removed from the bin insertion 1T117, and the disk cartridge can be pulled out from the disk drive device.

To assemble the disk cartridge, the disk 8 is placed in the disk storage chamber 6 of the lower case member 3, and parts such as a write protector are omitted. Next, the torsion spring 22 and the locking member 23 are connected so that one substantially linear portion 25a is placed on top of the locking member 23, and the other substantially linear portion 25a is placed on top of the locking member 23.
5b positioned below the lock member 23, insert the pin portions 33.36 of the lower case member 3 into the two pin holes 32.35 of the lock member 23, and bend one tip of the torsion spring 22. Insert the curved portion 26a into the spring locking chamber 27. Then, one tip bent portion 262L is placed in the spring locking chamber 27, and the other substantially straight portion 25b is placed in the spring locking chamber 27.
is arranged in the spring movement space 28 between the lower case member 3 and the temporary fixing portion 31 of the locking member 23. Therefore, even if an external force acts on the torsion spring 22, the coil portion 24 and the other bent end portion 26b butt against the temporary fixing portion 31 and the other substantially straight portion 25b will not come out of the spring movement space 28, and Since the tip bent portion 26a does not come out of the spring locking chamber 27, the torsion spring 22 is temporarily locked in a predetermined position. In this state, the upper case member 2 is placed over the lower case member 3, and the upper case member 2 and the lower case member 3 are joined with screws or the like. Finally, the shutter 13 is inserted from the opening direction so as to sandwich the case 1, and the other end near bent portion 26b is locked to the spring locking portion 20 of the shutter I3, and the process is completed.

Although this embodiment shows only one example of the temporary fixing part 31, the locking member 23 can be attached to the lower case member 3 or the upper case member 2.
Various design changes are possible as long as the tone spring 22 can be temporarily fixed when supported.

[Effects of the Invention] As described above, according to the present invention, in a shutter opening/closing mechanism having a torsion spring and a lock member, a temporary fixing portion for temporarily fixing the tone spring to the lock member is added, so that the upper case member and the port are The torsion spring is temporarily fixed when the lock part is supported on the lower case member, and the upper case member and lower case member are joined in this temporarily fixed state, so there is no need for caution in assembly and the torsion spring is There is an effect that assembly can be performed quickly and easily without failure in assembly due to positional deviation.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, FIG. 1 is a partially exploded perspective view of a disk cartridge, FIG. 2 is a partially sectional view of the disk cartridge, and FIG. 3 is a partially front view of the disk cartridge. FIG. 4 is a partial sectional view of the disk cartridge when the shutter is in the open position, and FIG.
6 and 6 show a conventional example, FIG. 5 is a partially exploded perspective view of a disk cartridge, and FIG. 6 is a partially cutaway plan view of the disk cartridge. l...Case, 2...Upper case member, 3...Lower case member, 10...Head insertion hole, 11...Shutter opening/closing mechanism, 13...Shutter, 22...Torsion spring , 23.40... Lock member, 31... Temporary fixing part.

Claims (1)

[Claims] (1) A case is constructed by joining an upper case member and a lower case member, a shutter for opening and closing the head insertion hole is slidably attached to this case, and a torsion spring and a lock member are arranged inside the case. , a disk cartridge provided with a spring force of the torsion spring acting on the shutter to urge the shutter toward a closed position, and supporting the locking member on the case to prevent the shutter from sliding in the closed position. 1. A shutter opening/closing mechanism for a disk cartridge, characterized in that a temporary fixing part for temporarily fixing the torsion spring is added to the locking member.